Details, datasheet, quote on part number: SE555QS-13
CompanyDiodes, Inc.
DatasheetDownload SE555QS-13 datasheet
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Features, Applications


SE555Q is precision timing circuit capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor. The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground. The output circuit is capable of sinking or sourcing current to 200mA. Operation is specified for supplies to 15V. With a 5V supply, output levels are compatible with TTL inputs.


Timing from Microseconds to Hours Astable or Monostable Operation Adjustable Duty Cycle TTL Compatible Output Can Source or Sink to 200mA Automotive Grade Qualified to AEC-Q100 Grade 1 Green Molding Compound (No Br, Sb) Totally Lead-Free & Fully RoHS Compliant (Notes & 2) Halogen and Antimony Free. "Green" Device (Note 3) PPAP Capable (Note 4)

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See for more information about Diodes Incorporated`s definitions of Halogen - and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. 4. Automotive products are AEC-Q100 qualified and are PPAP capable. Refer to

Pin Number Pin Name GND TRIG OUT RESET CONT THRES DISCH VCC Ground Trigger set 1/3VCC Timer output Reset active low External adjustment of internal threshold and trigger voltages Threshold set to 2/3 VCC Low impedance discharge path Chip supply voltage Description

RESET can override TRIG, which can override THRESH

Pin Name GND TRIG OUT RESET Nominal Trigger Voltage Irrelevant <1/3VCC Threshold Voltage Irrelevant <2/3VCC Output Low High Low Discharge Switch On Off On

SE555Q Absolute Maximum Ratings (Note = +25C, unless otherwise stated.)

Parameter Supply Voltage (Note 6) Input Voltage Output Current Package Thermal Resistance Junction-to-Ambient (Note 7) Package Thermal Resistance Junction-to-Case (Note 8) Junction Temperature Storage Temperature CONT, RESET, THRES, TRIG

5. Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 6. All voltage values are with respect ground. 7. Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient temperature PD = (TJ(max) TA)/JA. Operating at the absolute maximum +150 C can affect reliability. 8. Maximum power dissipation is a function of TJ(max), JC, and TA. The maximum allowable power dissipation at any allowable ambient temperature PD = (TJ(max) TC)/JA. Operating at the absolute maximum +150 C can affect reliability.

Symbol VCC IO TA Supply Voltage Input Voltage Output Current Operating Ambient Temperature CONT, RESET, THRES, TRIG Parameter Min 4.5 -40 Max 15 VCC 200 +125 Unit C

Electrical Characteristics (VCC +25 C, unless otherwise stated.)

Symbol VTH ITH VTR ITR VRST IRST IDIS VDIS VCON Parameter Threshold Voltage Level Threshold Current (Note 9) Trigger Voltage Level Trigger Current RESET Voltage Level RESET Current DISCH Switch Off-state Current VCC = 15V VCC = 5V VCC = 15V VCC = 5V TRIG at 0V RESET at VCC RESET at 0V Test conditions Min Typ Max Unit mV V

DISCH Saturation Voltage with Output VCC = 15V, IDIS = 15mA Low (Note 10) VCC = 5V, IDIS = 4.5mA CONT Voltage (Open Circuit) VCC = 15V VCC = 5V


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